I still think Solas has an alright chance of being an LI. Personally, with race gating, I think there will be 4 LIs of each gender. It would be extremely difficult to make the 2/2/2 stretch for race gating.
Confirmed male options are;
Cullen
Dorian
Suspected;
Iron Bull
Remaining;
Solas
Varric
Blackwall
Cole
So, really, I think Solas's real competition is Varric, Blackwall and Cole. We know Cole is extremely unlikely based on David Gaider's reaction. Blackwall is even older than Solas and he's a warden that's probably near his calling. Varric has his thing with Bianca, which they've talked about in interviews (that he may not be ready to let go, or something like that) and it's been hinted Bianca's story might not be done, as if she might still appear at some point. So, out of the remaining males, Solas actually has no more, or even less, argument against him being an LI.
Yeah, I know I made a big post with evidence against it, but my biggest issues are the "kids these days" thing someone else earlier in the thread pointed out, and the fact that BioWare may be looking to break their "all elves are LIs" pattern (they already broke the "all elves are bisexual" pattern with Sera). Other than that, considering Iron Bull will most likely be race gated against elves, Solas could be a solid possibility.
Then again, so could Varric, and people have pretty much BEGGED for Varric, and if he were available instead of Solas, I admit I wouldn't be too hurt by that. Would prefer Solas, but I remember enjoying Varric in DA2. The big thing against Varric is of course Bianca--the crossbow and the woman. It might go against his character to be a romance, thus again Solas is the better option.
Cole is a big NO. Mentality of a child, also likely asexual.
Blackwall... Doubtful. People do find him very attractive, however (I don't, but mostly because I'm not into beards), and even if it might be nice to have more nonhuman LIs, straight woman Inquisitors only seem to have one human LI option, whereas straight males will have two human female options (okay, where are the nonhuman options for dudes, I just realized they don't have ANY except Iron Bull if they're okay with m/m). Also, being close to his Calling could make for an interesting tragic romantic arc. He and Solas may be close in age. Beards, especially if they are greying, can make a person look older. But against his favor as an LI... he's very devoted to his perceived duty to the greater good as a Grey Warden. It likely puts him at odds with the other Wardens, but in DAO we're basically given hints that Wardens are meant to cut past ties and allegiances. They leave their families behind, etc. Everything is traded for the greater good. Romance might be seen as a distraction from that greater good, or duty too important to set aside time for romance.
The downside is that if there are eight LIs rather than 6, well... then the ONLY non-LI woman of the Inquisition becomes Leliana. That lends some really creepy vibes imho in terms of how women are being portrayed in this game, if nearly all of the women are romantically available in some way or another. This COULD be somewhat mitigated if Iron Bull and one of the women are more "fling" types, but it seems to me that qunari players may find themselves race gated away from certain LIs (i.e. Sera and Solas if he's available) and thus Iron Bull would almost certainly be a full-fledged LI to make up for it.